CVE-2025-50001 in Composer Plugin
Summary
by MITRE • 03/19/2026
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in tagDiv tagDiv Composer allows Reflected XSS.This issue affects tagDiv Composer: from n/a through 5.4.2.
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Analysis
by VulDB Data Team • 03/19/2026
This vulnerability represents a classic cross-site scripting flaw that exploits improper input sanitization during web page generation processes. The weakness resides in the tagDiv Composer component where user-supplied data fails to undergo adequate neutralization before being incorporated into dynamically generated web content. This allows malicious actors to inject arbitrary script code that executes in the context of other users' browsers when they view affected pages. The vulnerability specifically manifests as a reflected XSS attack, meaning the malicious payload is embedded in a URL or HTTP request parameter and immediately reflected back to the user's browser without proper encoding or validation. The affected version range spans from an unknown initial state through version 5.4.2, indicating this represents a long-standing issue that has persisted across multiple releases.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding mechanisms within the tagDiv Composer's web page generation pipeline. When user input is processed and rendered in web interfaces, the system fails to properly escape special characters that could be interpreted as HTML or JavaScript code. This creates an attack surface where malicious payloads can be injected through various entry points including form fields, URL parameters, or API endpoints that feed data into the composer's rendering engine. The reflected nature of this attack means that the malicious script is not stored on the server but rather transmitted through the application's normal request handling mechanisms, making it particularly challenging to detect and prevent through traditional server-side filtering approaches.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable sophisticated attack vectors including session hijacking, credential theft, and data exfiltration. Attackers can craft malicious URLs that, when clicked by unsuspecting users, execute scripts that steal authentication tokens, capture keystrokes, or redirect users to malicious sites. The reflected nature means that the attack can be delivered through phishing emails, compromised web links, or social engineering campaigns without requiring persistent server-side modifications. This vulnerability affects the integrity and confidentiality of user sessions, potentially allowing unauthorized access to sensitive information and system resources. Organizations utilizing tagDiv Composer in their web applications face significant risk of user data compromise and potential system infiltration through this vector.
Mitigation strategies for this vulnerability should focus on implementing comprehensive input validation and output encoding mechanisms throughout the application's data flow. The primary defense involves ensuring that all user-supplied input is properly sanitized and encoded before being incorporated into web page content, particularly when the data is rendered in HTML contexts. Implementing strict Content Security Policy headers can provide additional protection by limiting the sources from which scripts can be executed. Regular security updates and patches should be deployed immediately upon availability, as this vulnerability has been identified in multiple versions of the software. Organizations should also consider implementing web application firewalls and runtime application self-protection mechanisms to detect and block malicious input patterns. From a compliance perspective, this vulnerability aligns with CWE-79 which specifically addresses cross-site scripting flaws, and maps to attack techniques in the ATT&CK framework under T1566 for phishing and T1059 for command and scripting interpreter attacks.